What does errno 50 (ENOCSI) mean? Status / error code: Category: Constant name: Source: Operating System: Description: No CSI structure available Could be also: ConstantTypeOS ERROR_NOT_SUPPORTEDWin32 errorWindows KERN_CODESIGN_ERRORKern returnMac ippStsUnknownFeatureIntel Ipp StatusAny ENETDOWNerrnoMac EBADEerrnoSolaris PHASE1_INITIALIZATION_FAILEDBugCheck CodeWindows Looking for a different code? Search another status or error code.